Tube coupling



y 19, 1931; H. D. HUKILL I 1,805,666

' TUBE courm no Filed July 19, 1928 INVENTOR HENRY D. HUKILL ATTORNEY Patented May 19, 193i srArss PA'iii OFFHCE' Y-I). OI PITTSBURGH, PENNSYLVANIA, 5.8816303 '20 m WESTING- PENNSYLVANIA. A 00320353310! vms L as comm, or 1mm,

commute Application filed Iuly 18, ms. semi mi.- 898,809.

This invention relates to pipe couplings, 21116. more particularly to a. pipe coupling the compression sleeve type. With prior types of compression sleeve con- 5 plings, it is necessary to entirely disassemble the pipe fitting, place the sleeve over the pipe, and then assemble the parts of the pipe fitting. Furthermore, in disassemhlin the fitting, the sleeve is often firoppezi an has to be pickeri up and placed on the pipe.

The principal object of my invention is to provide a self-centering sleeve, such that the pipe may he inserteti in the pipe fitting without disessembling the fitting, so that a. conpling may he more quickly and more easily effecte&.

In the eccompenying rlrazwing, Fig. 1 is a. sectional view of a, pipe fitting, emhoeying my invention; anrl Fig. 2 a. sectional view of a. pipe fitting emhociying my invention, in

it somewhat moclifierl form.

In Fig. 1 is shown e pipe fitting having e. nipple 1 having at one end exterior screw threaais and e not 2 hevin interior screw 25 threads eriapteri to engage the screw threecis of the nipple.

A double teperel sleeve 3 provided have ing the taper int one end preferably at an angle of 60 degrees and the taper 5 at the oth-,

er eml at an angle of i5 ciegr ees, the tapers running to ev e clge at the enter extremity;

Ehe not 2 is provilerl with e. 60 degree toper acleptefl to engage the 60 degree taper of the sleeve anal the nipple 1 is provided with f e degree taper.

L Intermeeiiete the tapers of the sleeve is .e. cvlimlricel portion 6 adapteri to bear against the inner edges of the screw threads in the.

not 2, so as to assist the taper tin centering the sleeve;

When the artsof the fitting sire essemhlecl, as shown in 1, the 45. degree taper of the nipple 1 permits onlyv e point engagement wit 1 the 15 iegree taper of the sleeve at the 45 ememe w erlge of the tsp-er. The Gil the taper of the sleeve 3 fits the (ie taper of the net 2 end therehp centers the sleeve respect to the pipe fit;

The sleeve being selt-centerw, a, pipe-may he reaieily insertei into the h ,snriece engaging a correspon insertion of the pi e;

After the pipe as been inserted into the fitting, the nut 2' is screwed down, so that the thin edge of the taper 5 is compressed into the pipe by the action of the taper on the "nipple 1, while the 60 degree taper is also acted upon by the 60 degree taper in the nut 2, to compress the 60 degree end of the sleeve on the pipe.

The construction shown in Fig.- 2 is similar to that shown in Fig. 1 except that in this case, the 60 degree to er of the sleeve is arranged to engage a 60 egree taper in the nipple 1 while thg thinedge ofthe 15 degree ts er 0% the sleeve is arranged to engage a. 45 egree taper on the not 2'.

While one illustrative embodiment of the invention has been (iescribed in rieteii, it is not my intention to limit its scope to that cut-- botiiment or otherwise than by the terms of the appended claims. I

Having now describe& my invention; what I claim as new anti desire to secure by Letters Patent is:' p l. The eombinetionwith a pair of coupl members, of e sleeve having opposeci tepei surfaces tapered to a. thin ed one teperefi surface engegin a. surface 0 corresponding taper on one of t e coupling members and the thin edge of the other tapered snrfece contactm' Ewith a more abrupt tepereci surface on the ot er coupling member.

2. The combination with a pair of coup members, of a sleeve having a sharp tepere surface at one end emi an abrupt tepereci snr= face at the other end, both surfaces being tapered to :1. edge, and the abrupt tapered surface on one of the coupling 'mem ers, while the of the sharp ts ereei surface contacts at portion of an a rcpt tapered seriece on the other coupling member.

The WM-l 1 1 otion with e pair of conplin memhers one external three surfaces teperee to e t w and an ntertapered its t M inte'scvv threads of the other memer, of e sleeve op tepereti mediate. cylindrical surface engaging the internal threads of one member, one tapered surface engaging a corresponding tapered surface of one member, and the other tapered surface having its .thin edge engaging a portion of a more abrupt tapered surface on the other member. p v

In testimony whereof I have hereunto set my hand, this 14th da of July, 1928. RYD.HUKILL, 

